﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OverLoadDemo
{
    class Area
    {
        public double pai,r;
        public double a, b;
        public double area(double pai,double r)
        {
            return pai * r * r;
        }
        public double area(double a,double b)
        {
            return a * b;
        }
    }
}
